Disk brakes... have cars ever had inboard disc brakes?

[drivin_me_nuts]

Does anyone know of a car that has inboard disc brakes... or a car / road vehicle that has more than two discs per axle. I was wondering if very large vehicles (I was thinking military) ever do.

[XJ84]

Some old jags and citroens have inboard discs.

[LandingSpot]

drivin_me_nuts said:

Does anyone know of a car that has inboard disc brakes... or a car / road vehicle that has more than two discs per axle. I was wondering if very large vehicles (I was thinking military) ever do.

Jag E Type had inboard disc brakes IIRC. Great design IMO.

[drivin_me_nuts]

LandingSpot said:

drivin_me_nuts said:

Does anyone know of a car that has inboard disc brakes... or a car / road vehicle that has more than two discs per axle. I was wondering if very large vehicles (I was thinking military) ever do.

Jag E Type had inboard disc brakes IIRC. Great design IMO.

Do you know why they did it that way?

[XJ84]

drivin_me_nuts said:

Do you know why they did it that way?

reduce unsprung weight??

[LandingSpot]

XJ84 said:

reduce unsprung weight??

[Cerberus90]

TVR Wedges have inboard discs too. Not sure if its all of em or not, only the ones with the, Jag is it, diff.

[Boba Fret]

Alfa 75 did

[robsco]

Alfa 75.

[Randy Winkman]

Alfasud - inboard fronts.

[Gwagon111]

Some early Ferraris, and the Alfa 75 did.

[andye30m3]

LandingSpot said:

Jag E Type had inboard disc brakes IIRC. Great design IMO.

I seam to remember it makes changing discs a painful experience, I have very old memories (probably 20 years ago) of dropping the whole rear axle of ours to change either the discs or calipers

[ROOODBOY]

Jaguar XJ6s and XJSs in the 1970s and 1980s had them at the rear, the TVR Wedge used this Jaguar set up.

I think, as well as unsprung weight, it was a way of keeping weight towards the centre of the car and increasing stability..?

I think some older Citroen and Alfa Romeos had them at the front.

[Hitler Hadrump]

Rover P6 had rear inboard discs.

[williamp]

Aston DBS, DBS V8, V8 saloon, Vantage and Volante all had inboard discs too. A great idea in theory, but they heat build up knackers the seals on the rear diff.

Oh, and to inspect/replace the pads you simply remove the rear seats, the rear access panel. Then you have access to the calipers...

[AnotherClarkey]

Citroen 2CV

[The Black Flash]

I imagine they put a lot more strain on the driveshafts and cv joints as well.

[drivin_me_nuts]

... so are there any vehicles around with more than 2 discs on the same axle, or is it completely unneccessary?

[harryowl]

Lotus Elite and Elans also have inboard discs

[Megaflow]

drivin_me_nuts said:

... so are there any vehicles around with more than 2 discs on the same axle, or is it completely unneccessary?

One of the large car engineering outsourcing houses, TRW IIRC, was playing around with twin discs a few years ago. The problem with the design, and I'm sure all types of twin disc designs, is the discs have to float, and trying to keep them clean and free moving in the environment they live in is very tricky.